            &\multicolumn{1}{c}{30 Days}&\multicolumn{1}{c}{60 Days}&\multicolumn{1}{c}{90 Days}&\multicolumn{1}{c}{120 Days}\\
\hline
\raisebox{-2.3mm}[0mm][0mm]{$\hat{\beta}$}&   3.144e+08** &   4.820e+08** &   5.424e+08** &   4.239e+08   \\
            & (1.383e+08)   & (2.075e+08)   & (2.295e+08)   & (2.660e+08)   \\
\it{p-value}&     [0.023]   &     [0.020]   &     [0.018]   &     [0.111]   \\
\it{h}      &       0.028   &       0.021   &       0.019   &       0.021   \\
Obs.        &      46,912   &      46,912   &      46,912   &      46,912   \\
\hline\\[-3mm]&\multicolumn{4}{c}{E-Procurement}\\
            &\multicolumn{1}{c}{30 Days}&\multicolumn{1}{c}{60 Days}&\multicolumn{1}{c}{90 Days}&\multicolumn{1}{c}{120 Days}\\
\hline
\raisebox{-2.3mm}[0mm][0mm]{$\hat{\beta}$}&   6.789e+08***&   1.225e+09***&   1.344e+09***&   1.205e+09** \\
            & (2.623e+08)   & (4.598e+08)   & (4.601e+08)   & (5.702e+08)   \\
\it{p-value}&     [0.010]   &     [0.008]   &     [0.003]   &     [0.035]   \\
\it{h}      &       0.028   &       0.021   &       0.022   &       0.029   \\
Obs.        &      21,350   &      21,350   &      21,350   &      21,350   \\
\hline\\[-3mm]&\multicolumn{4}{c}{Paper Based}\\
            &\multicolumn{1}{c}{30 Days}&\multicolumn{1}{c}{60 Days}&\multicolumn{1}{c}{90 Days}&\multicolumn{1}{c}{120 Days}\\
\hline
\raisebox{-2.3mm}[0mm][0mm]{$\hat{\beta}$}&   1.662e+08   &   2.305e+08   &   2.967e+08   &   2.743e+08   \\
            & (1.701e+08)   & (2.197e+08)   & (2.510e+08)   & (2.669e+08)   \\
\it{p-value}&     [0.329]   &     [0.294]   &     [0.237]   &     [0.304]   \\
\it{h}      &       0.024   &       0.022   &       0.020   &       0.020   \\
Obs.        &      25,565   &      25,565   &      25,565   &      25,565   \\
